Power-hammer.



No. 638,058. Patented Nov'. 28, |899. J..A. MORRIS.

POWER HAMMER.

(Application med .my e, 1899.)

(No Nudel.) A

`UNITED STATES PATENT OFFICE".

JAMES A. MORRIS, OF AYRSHIRE, IOWA.

PowER-HAMME.

forming part of Letters 'Patent No. 638,058, dated November 28, 189i?.

Application filed July 6, 1899.` Serial No. 722,943. (N0 model.)

T0 aZZ whom t rnwy concern:

Beit known that l, JAMES A. MORRIS, a citizen of the United States, residing at Ayrshire, in the county of Palo Alto and State of Iowa, have invented a certain new and useful Power- Hammer, of which the following is a specilication, reference being had therein to the accompanying drawings.

This invention relates to power-hammers.

The object of the invention is to provide an efticient power-hammer of simple and economical construction.

The invention consists in a power-hammer involving the combination of suitable framework, an anvil-block arranged in front of the framework, a hammer arm or beam pivoted at the rear part of the frame, a hammer-operating crank-shaft mounted in the frame above the hammer-arm, a compound eXtensible pitman for coupling the crank-shaft and hammerarm, adjustable spring-buffers ou the pitman above and below the hammer-arm, a belt-pulley on the crank-shaft, a springsupported tension-pulley, and a treadle operatively connected with the tension-pulley for imparting tensionto the driving-belt.

The invention also consists in the particular construction of compound pitman, whereby the same is conveniently connected with the hammer-operating crank-shaft.

In the drawings, Figure 1 is a side elevation of my improved power-hammer, and Fig. 2 is a sectional elevation of the compound pitman.

The frame consists of uprights 1 1, having rearwardly-extending projections 2 2, forwardly-projecting sills or base-pieces 3 3, and head or cap piece 4. To the rearwardly-extending projections is pivoted one extremity of a hammer-carrying beam or arm 5. Any suitable means of attachment of this arm to the rearward projections may be adopted, a

. convenient means being illustrated in the drawings. Beneath the hammer r7,removably attached to the arm 6, is an anvil-block 8. This anvil-block is suitably secured in fixed position between the sills or base of the frame, as shown, the top of the anvil-block being rigidly and firmly supported by` means of braces 9 9, extending from the block to prights 1. Mounted near the upper end of the uprights is a hammer-operating crank-shaft 10, carrying a driving-pulley 11. The crank is coupled with the hammer-arm by means of a pitman consisting of threaded rod 12, an open strap or yoke 13, adj ustably connected with the threaded rod, a forked block 14, arranged and secured in the open end of the strap, and a key-piece l5, secured in the forked end of the block to inclose the crank. The threaded rod and strap are coupled together through the medium of nuts 16 and 17 in such way that the pitman may be extended or reduced in length, as may be desired. The hammer-arm isprovided with a passage through the same between its ends, and the threaded rod extends through this passage, and the rod is provided intermediate its ends with a-shoulder or nut 18 and at its extremity with a tap or nut 19. Between the upper side of the hammer-arm and the shoulder 18 is applied a spring 20, a suitable washer being interposed between the spring and the hammer-arm, and a similar spring is arranged beneath the hammer-arm and held to position by means of the tap or nut 19. Projecting rearwardly from the head or cap piece 4 is a spring-arm 21, which carries a vibrating frame 22, on which is loosely mounted a tension-pulley 23. Operatively connected with the loosely-swinging frame is a treadle mechanism consisting of a yoke 24, pivoted to the uprights and extending around in front of the anvil-block and connecting-rods 25, as clearly shown in the drawings. The drivingbelt 26 is intended to run freely over the pulley 11 when the hammer is not in operation; but when it is desired to throw it into operation the operator, through treadle 24, causes tension-pulley 23 to impinge the belt and impart such tension thereto and to the drivingpulley 11 and the crank-shaft to which it is attached, and thereby operate the hammer.

Having described my invention, what I claim, and desire to secure by Letters Patent, 1s-

In power-hammers, the combination of suitable framework, an anvil-block in front of the framework, a hammer arni or beam pivoted ley, and a breadle operatively connected with at; the rear of the frame, a hammer-operating the tenson-pulley,substanbially as described. 1o crank-shaft mounted in the frame above the In testimony whereof I affix my signature hammer-arm, an extensible pitman for eoupin presence of two Witnesses.

5 ling the crank-shaft and hamxner-arm,adj ustl JAMES A. MORRIS.

able spring-buffers on the pitrnan above and Witnesses:

below the hammer-arm, a belt-pulley on the W. D. BROWN, crank-shaft, a spring-supported tension-pul- L. R. BROWLER. 

